221303101 has 2 divisors, whose sum is σ = 221303102. Its totient is φ = 221303100.

The previous prime is 221303063. The next prime is 221303107. The reversal of 221303101 is 101303122.

221303101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 153636025 + 67667076 = 12395^2 + 8226^2 .

It is a cyclic number.

It is not a de Polignac number, because 221303101 - 2²¹ = 219205949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221303107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110651550 + 110651551.

It is an arithmetic number, because the mean of its divisors is an integer number (110651551).

Almost surely, 2^221303101 is an apocalyptic number.

It is an amenable number.

221303101 is a deficient number, since it is larger than the sum of its proper divisors (1).

221303101 is an equidigital number, since it uses as much as digits as its factorization.

221303101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 221303101 is about 14876.2596441444. The cubic root of 221303101 is about 604.8706332689.

Adding to 221303101 its reverse (101303122), we get a palindrome (322606223).

The spelling of 221303101 in words is "two hundred twenty-one million, three hundred three thousand, one hundred one".